Arrangement for automatically inserting type group shift signals in keyboard transmitters

ABSTRACT

A teleprinter keyboard arrangement for automatically inserting type group shift signals. The shift signal is provided by depressing any key not included in the type group used in the previous action. The result therefrom is a change in the relative positions of two interacting bars forming a shift bar assembly. One of the bars responds and is common to all figure keys, and the other responds and is common to all letter keys. The relative change of positions of the bars disconnects the actual transmitter in favor of an auxiliary transmitter for the time required for transmission of one signal combination. The operation provided is accomplished without the aid of storage facilities.

United States Patent Inventors Appl. No.

Filed Patented Assignee Priority ARRANGEMENT FOR AUTOMATICALLY INSERTINGTYPE GROUP SHIFT SIGNALS IN KEYBOARD TRANSMITTERS 13 Claims, 6 DrawingFigs.

Int. Cl

Field of Search A, 17 C, 17 D, 79, 80, 81,17.5

References Cited UNITED STATES PATENTS 2/1967 Gassino Primary Examiner-Kathleen II. Claffy Assistant Examiner-Tom DAmico Attorneys-C. CornellRemsen, .lr., Walter J. Baum, Percy P.

Lantzy, Philip M. Bolton, Isidore Togut and Charles L. Johnson, Jr.

ABSTRACT: A teleprinter keyboard arrangement for automatically insertingtype group shift signals. The shift signal is provided by depressing anykey not included in the type group used in the previous action. Theresult therefrom is a change in the relative positions of twointeracting bars forming a shift bar assembly. One of the bars respondsand is common to all figure keys, and the other responds and is commonto all letter keys. The relative change of positions of the barsdisconnects the actual transmitter in favor of an auxiliary transmitterfor the time required for transmission of one signal combination. Theoperation provided is accomplished without the aid of storagefacilities.

PATENTEnuuv 2 19m sum 1 HF 5 Fig.7

INVENTORS 0 rro HOL STE/IV WA L TER HER w/q ATTORNEY PATENTEDunv 2 1911sum 2 0'? 3 INVENT 0R5 orro HOLSTEIN I WALTER msnw/q ATTORNEYPATENTEnuuv 2 usn sum 3 or 3 INVENTORS O TO HOL STE/N NA L TEA Hen w/cATTORNEY ARRANGEMENT FOR AUTOMATICALLY INSERTING TYPE GROUP SHIFTSIGNALS IN KEYBOARD TRANSMITTERS BACKGROUND OF THE INVENTION The presentinvention relates to an arrangement for automatically inserting caseshift or type group signals in keyboard transmitters used in teleprinterengineering, or the like, in which each key lever of the keyboard unitis assigned a single character (complete keyboard), and in which thedisengagement of the once tripped transmitter clutch is dependent upon apresetting effected in the course of the transmitter shaft rotation.

Owing to the double utilization of the employed five-unit code ascustomary in the case of the international telegraphic alphabet. it isnecessary for the characters which are divided into two groups of types(cases), to be preceded by a so-called type group or case shift signalidentifying the respective group or case when changing from the one tothe other case or type group. In the case of normal quantity-producedmachines the insertion of these functional signals into the sequence oftransmitted text signals is effected by the manual actuation of specialtypes of keys. By this necessity, however, the teleprinter operation isrendered more difficult and calls for a certain training of theoperator.

For eliminating this disadvantage various types of embodiments ofstorage devices have become known with respect to teleprinting machines,with the aid of which it is possible to carry out an automatic insertionof the type group or case shift signals, with these arrangements stillhaving the added advantage that owing to the intermediate storage whichis independent of the transmitting rhythm, there is enabled a mode ofprinting which is individual within wide limits.

These kinds of arrangements are very costly, and due to the highmanufacturing costs, are normally not installed into quantity-producedmachines.

SUMMARY OF THE INVENTION It is the object of this invention to providean arrangement by means of which it is possible without the aid of amultisignal combination storage device, to effect an automatic insertionof the type group or case shift signals.

According to the present invention this problem is solved in that thereis provided a shift bar assembly which is common to all key levers andwhich, upon shifting the type group or case, is changed or shifted bythe respective key from a first switching position into a secondposition. The movement of the bar effects a disconnection of the actualtransmitter in favor of an auxiliary transmitter for the time requiredfor the transmission of one signal combination. This auxiliarytransmitter, in dependence upon the position of the shift bar, eithertransmits the one or the other type group or case shift signalcombination. The rearward or return shifting to the actual transmitteris effected during the stop element of this type group or case shiftsignal combination, and up to this time position (i.e. the time slot forthe stop element of the type group or case shift signal combination thepresetting of the transmitter clutch is suppressed.

Accordingly, with the aid of this arrangement, and upon a shifting ofthe type group or case, there is first effected the transmission of therespective type group or case identification, which is directly followedby the signal combination corresponding to the depressed key. Duringthis time the keyboard unit remains protectively blocked from the lackof a storage facility.

This blocking property, which at first appears to be a disadvantage,however, has practically no reaction upon the operator in the case ofmachines which are operated at a speed of 75 Baud or more, because inthis case the maximum blocking time, as a rule, is shorter than thenormally appearing highest sequence of striking operations.

BRIEF DESCRIPTION OF THE DRAWINGS The invention will now be explainedwith reference to the accompanying drawings, in which:

FIG. 1 shows the arrangement according to the invention in a schematicalrepresentation; 1

FIG. 2 shows a perspective partial view of FIG. 1,

FIG. 3 shows another possibility of embodying the detail of FIG. 1 asshown in FIG. 2;

FIG. 4 shows one possible electrical variety with respect to themechanical control as shown in FIG. 1;

FIG. 5 shows the corresponding circuit of FIG. 1; and

FIG. 6 shows the circuit relating to FIG. 1 as modified in accordancewith FIG. 4.

DESCRIPTION OF THE PREFERRED EMBODIMENTS In the schematicalrepresentation of FIG. 1 the two key levers l and 2 are representativeof the complete set of key levers as contained in a teleprintingmachine, via which in a well-known and, therefore, not shown way, thereis effected the setting of the selecting bars of the keyboardtransmitter. Via a likewise not shown tripping or releasing bar there iseffected in the course of this, upon each depression of a key, theswiveling of the supporting pawl 15 via a pull bar 18, so that theuncoupling lever (clutch throwout lever) 19, owing to the effect of thetension spring 21, is disengaged from the transmitter clutch 23. In thecourse of the subsequently following rotation of the transmitter shaft25 there is fed out in the normal case, i.e. when no shifting of thetype group or case has been performed, the code combination as fed invia the selecting bars, by the actual transmitter 26 via thetransmitting contacts Skss and Skl to Sk5 (FIG. 5) in the conventionalway either in serial or parallel form. After completion of one rotationthe transmitter shaft 25 is stopped again owing to the engagement of theuncoupling lever 19, which has meanwhile been moved back by the resetcam 24 via the reset member 19a into the latched normal position, withthe clutch 23.

This normally existing arrangement, within the scope of the invention,is extended in so far as instead of the hitherto conventional lockingbar, there is used e.g. a set of shift bars 3 according to FIGS. 1 and2. This set consists of two vertically adjustable bars 3a and 3bextending along the keyboard unit below the keylevers 1 and 2, withthese bars being in connection with one another via two cross levers or.brackets 4 (only one of which is shown) which are pivoted on two firmlyarranged shafts 5. These cross levers or brackets are in communicationwith one another via a coupling rod 4a so that a vertical depressionexerted upon one of the bars 3a or 3b will result in an oppositelydirected parallel displacement of the bars in relation to one another,whereas the cross levers 4 perform a swivel movement in the course ofwhich the coupling rod 4a is displaced in the horizontal direction.

Each of the key levers 1 and 2 is provided with a cursor la or 2arespectively having the shape as shown in FIG. 2, so that upondepressing a key this will each time only have an. influence upon one ofthe bars 3a and 3b.

The connecting bolts 4b between the one cross lever 4 and the bar 30 isengaged by a connecting lever 6 which is of a fork-shaped design at thisend and which, in its center, is pivoted on a turning pin 7 and which,at its other end, is provided with a sliding bolt 6a. This bolt is in anoperational connection with a two-armed locking pawl 8 which isrotatably mounted at the pivot point 9, and which is provided at itslower end. within the swivel range of the bolt 6a, with a lifting cam8a. The upper end of the pawl 8 is provided with a bolt snug 8b.Underthe influence ofa tension spring 10, the pawl 8 is retained in aforce-locking connection with the bolt 6a. In the normal position asresulting therefrom, the snug 8b is in engagement with the pawl shapedprojection 11a of a threearmed shift lever 11 which is rotatably seatedon shaft 13 and is being acted upon by a tension spring 14 which strivesat turning the shift lever 11 in the clockwise direction. The one arm ofthe lever 11 ending up in the pawl-shaped projection 11a is providedbelow the projection 11a with an inclined portion 11b which is opposedby a correspondingly designed inclined projection a of the supportingpawl 15. The opposite arm of the shift lever 11 is provided at its endwith a slide roller 12 which, upon releasing of the lever 11 by thelocking pawl 8, comes into an operational connection with a reset carnplate 27a forming part of the auxiliary transmitter 27. Thevertically'extending third arm of the lever 11 carries at its end aswitching pin 110 via which the lever 11 acts upon the middle contactspring of a switchover contact Uk.

In the shown normal condition the supporting pawl 15 as pivoted at point16 is in the position as shown, owing to the tension-spring action 17acting thereupon. In this position the free end 19b of the uncoupling orclutch throwout lever 19 which is pivoted on a shaft 20, rests upon thesupporting snug 15b under the action of a tension spring 21. In thislatched normal position of the uncoupling lever 19, the transmitterclutch 23 is retained in a defined position on the transmitter shaft 25when in the disengaged condition.

Via this transmitter shaft 25 there is driven the actual transmitter 26in the manner known per se, with the actual transmitter, according toFIGS. 5 and 6, including the transmitting contacts Skss and Skl to SkS.By the same shaft there is also actuated the auxiliary transmitter 27,with the cam plates 27b and 27c thereof acting upon the additionaltransmitting contacts SkZ or SkB respectively, whereas the alreadymentioned cam plate 27a indirectly has an influence upon the switchovercontact Uk. In cases where the signals to be transmitted are coded inaccordance with the international telegraphic code number 2, forexample, the cam plate 27b will have the shape as shown in FIG. 1, onaccount of which the associated transmitting contact SkZ is opened forthe time of the start element, during the third element, and for thetime of the stop element. The cam plate 270, in distinction thereto, hasa shape according to which the transmitting contact SkB is onlypermitted to close during the third signal element. This transmittingcontact SkB is moreover capable of being influenced by a locking lever22 acting upon the switching spring of the contact and which, in apredetermined position, prevents the transmitting contact SkB from beingclosed during the third signal element. The one or the other conditionis determined by the position of the coupling rod 4a, to which there isconnected in a form-locking manner the locking lever 22 capable ofrotating about a pivot point 32.

The mode of operation of this arrangement is as follows: It is assumedthat up to now there has been established in the type group Letters asassociated with the keys 2. Since the depression of these key levers 2which are associated with this particular type group is not linked toany positional shift of the two bars 3a and 3b, there is performed thetransmission process briefly described hereinbefore as the normal case.

However, if thereafter one of the keys 1 is actuated which is associatedwith the type group Figures, then via the cursor la according to FIG. 2,which is associated with this particular key lever, the 3a bar is pusheddownwards. This, as already described, causes the cross levers 4 toperform a clockwisely directed swivel movement about their shafts 5. Onaccount of this, the coupling rod 4a is once displaced towards the leftin the direction as indicated by the arrow (FIG. 1), thus causing thelocking lever 22 to release the transmitting contact SkB. At the sametime, and via the connecting bolt 4b, the lever 6 is swiveled in theanticlockwise direction. This causes the locking pawl 8 to be swiveledin a clockwise direction in accordance with the stroke of cam plate 80,by the action of the slide bolt 6a, so that the bolt snug 8b becomesdisengaged from the pawl-shaped projection 11a. The thus-released shiftlever 11, under the action of the tension spring 14, performs a swivelmovement in the clockwise direction, which is restricted by the slideroller 12 meeting against the cam plate 27a. In so doing, and via theswitching pin 110, the middle contact spring of the switchover contactUk is brought into contact with the spring Uk2. Owing to the specialdesign of the lifting cam portion 8a, the locking pawl 8 is permitted toreassume the normal position subsequently to the releasing movement ofshift lever 11, and under the action of its tension spring 10.

While this shifting or switching is being performed, there is effected,in the manner described hereinbefore, the releasing of the transmitterclutch 23, in that the pull bar 18, via the inclined projection 15c,swivels the supporting pawl in the clockwise direction thus eliminatingthe supporting of the free end 19b of the uncoupling or clutch throwoutlever 19 by the supporting snug 15b. The thus-released uncoupling orclutch throwout lever 19 is swiveled in the clockwise direction by theaction of the tension spring 21, thus releasing the symbolicallyrepresented clutch 23 which is now caused to engage and serves to couplethe transmitter shift 25 to a not shown continuous drive. The stroke ofthe uncoupling lever I9 is limited by meeting of the reset member 19aagainst a reset cam 24 forming one structural unit with the clutchmember to be driven.

Upon actuation of the set of changeover contacts Uk as describedhereinbefore, the transmitting contacts Skl to SkS of the actualtransmitter 26 are disconnected, according to FIG. 5, in favor of thetransmitting contacts SkZ and SkB of the auxiliary transmitter 27.Accordingly, there is effected, during the tripped transmitter shaftrotation, the transmission of a signal corresponding to the cam plates27b and 27c, with this signal, owing to the superposition of thetransmitting contact SkZ which is open during the third signal element,by the transmitting contact SkB which is closed during this signalelement, consisting of nothing but mark signal elements. This codecombination, however, corresponds to the type group signal Figures whichthus, in the transmitting and receiving machine, automatically releasesthe switchover to the respective type group.

Owing to the swiveled shift lever 11, the resetting of the uncoupling orclutch throwout lever 19 to the normal position, as is effected by theaction of the reset cam 24 upon the reset member 190, is preventedduring the transmission of the respective type group signal combination,in that the supporting pawl 15 in the swiveled-out position meets withits inclined projection 15a against the inclined portion 11b.Accordingly, the uncoupling lever 19 will return after the attemptedreset thereof to the lifted-off position due to spring 21 unhindered bysupporting snug 15b, so that in this way there is safeguarded the secondrotation of the transmitter shaft 25 which is necessary for transmittingthe actual signal combination corresponding to the depressed key.

During the stop element of the transmitted type group of case shiftsignal, the shift lever 11 is returned to normal by the cam of plate 270becoming effective at this stop element time position via the slideroller 12, and is fixed again in this position by the locking pawl 8. Inthis way the switchover contact Uk returns to normal, wherein the middlespring and the contact spring Ukl are in a conducting connection, so,that now the transmitter contacts Skl to Sk5 are closed again (FIG. 5).On the other hand the supporting pawl 15 is released again which,accordingly, during the next offering process (resetting attempt),latches the uncoupling or clutch throwout lever 19 in the lockingposition.

By the blocking of the keyboard unit, which is effected in theconventional way, together with the transmission of the type groupsignal, it is safeguarded that the code combination as set via the setof selecting bars will remain to be stored in an unchanged fashion. Inthe course of the subsequently following rotation of the transmittershaft, this signal combination, by directly following the automaticallyinserted type group or case shift signal combination, is transmitted inthe conventional way via the transmitting contacts Skl to Sk5, and aftercompletion of this process, the transmitter is stopped again in the wayas described hereinbefore.

If, subsequently hereto, typing is continued within the same type groupor case, there is effected no positional change of the bars 3a or 3brespectively. The respective transmission process is therefore onlyrestricted to the respective selected combination.

Only if, by the actuation of a key 2 belonging to the other oranothertype group, the bars 3a and 3b are again readjusted with respectto one another, there is effected in the way as described hereinbefore,the automatic insertion of the associated type group shift signalLetters. Since this combination in the third element is of the spacetype, the superposition of the transmitting contact SkZ by thetransmitting contact SkB in the third signal element must be avoided. Tothis end the locking lever 22 is hinged to the coupling rod 4a. Via thislever, in the shown position of the coupling rod 4a, the transmittingcontact SkB is influenced in such a way that it is prevented fromfollowing the course of the cam plate 270 and, accordingly, is preventedfrom closing during the third signal element. In this way there istransmitted the signal combination as given by the cam plate 27b which,by the third signal element of the space" type, represents the typegroup shift signal combination Letters.

Instead of the set of shift bars 3 it is also possible, according toFIG. 3, to use a toothed shift bar 28 with the inclined tooth edgesthereof, quite depending on the respective type group or caseassociation of the key lever 1 or 2 positioned thereabove, beingdirected either towards the left or towards the right. At the right handend this bar is provided with an inclined oblong hole 28b to which thereis engaged theconnecting lever 6 via a pin 6b. Moreover, in thisparticular case the locking lever 22 is directly hinged to the bar 28,with the representation being of a purely symbolical nature. Owing tothe corresponding arrangement of the teeth 280, the bar'28, whenchanging or being shifted from one type group or case to the other, isshifted into the one or the other horizontal final position. In thecourse of this the connecting lever 6, in accordance with the inclinedposition of the oblong hole 28b, is swiveled into the one or the otherposition in the course of which it, in the way as already described,redirects the locking pawl 8 in accordance with the stroke or liftingmovement of the lifting cam portion 8a, and thus automatically releasesthe automatic insertion of one of the two type group or case shiftsignals. Via the locking lever 22, and each time in dependence upon theposition of the shift bar 28, the transmitting contact SkB is renderedeither effective or ineffective.

FIG. 4 shows another embodiment in connection with FIG. 6. By using theset of shift bars 3 according to FIG. 1, the functions of both theconnecting lever 6 and the locking lever 22 are in this case performedby electrical components. To this end two switching earns 29 and 30 arefirmly arranged on the coupling rod 4a, with these cams serving toactuate the microswitches M82 and M81. While the cam 29 is so designedand arranged as to actuate the switch M82 only when the coupling rod isbeing displaced towards the left, the cam 30 is so designed and mountedthat it will momentarily actuate the switch MS] upon every horizontaldisplacement of the coupling rod 40. By this there is each timecompleted the circuit of a pull magnet 31 which serves to actuate thelocking pawl 8. To this end this pawl is provided at its bottom end withan armature plate 80 instead of with the lifting cam portion 8a.Accordingly, in result of an influence upon the bars 311 or 3bdisplacing the coupling rod 40, the pull magnet 31 is each timemomentarily energized, so that this magnet momentarily (temporarily)deflects the locking pawl 8 and, consequently, releases the automaticinsertion of a type group or case shift signal in the way as describedhereinbefore. Which of the two possible signals will thus be transmittedis entirely dependent upon the switching condition of the microswitchMS2 which, in accordance with the showing of FIG. 6, is arranged inseries with the transmitting contact SkB of the auxiliary transmitter 27and via which, in analogy with the locking lever 22, it is determined asto whether or not the transmitting contact SkB will become effective.

In the examples described hereinbefore, the disconnection of the actualtransmitter 26, according to FIGS. 5 and 6, was restricted to thetransmitting contacts Skl to 51:5, whereas the transmitting contact Skssproducing the start-stop elements also remained effective in connectionwith the auxiliary transmitter 27. Bycorrespondingly designingthecam'plate 27b,

the synchronizing pulses, however, could also be given on to the linevia the transmitting contact SkZ, so that, if so required, together withthe switching over to the auxiliary transmitter 27, it would be possibleto effect a complete disconnection of the actual transmitter.

We claim:

1. A teleprinter keyboard transmitter arrangement for automaticallyinserting character (type) group shift signals, in'

which the individual key levers of the keyboard unit are assigned asingle character and in which disengagement of the transmitter clutch,following the actuation of a key lever requiring a type group shift, isdependent upon a presetting which is effected in the course of thetransmitter shaft rotation, comprising:

a. an actual transmitter for transmitting character code signalcombinations;

b. an auxiliary transmitter, having a common transmitter shaft with saidactual transmitter, for transmitting type group shift signalcombinations;

c. a shift bar assembly common to all key levers, including a pair ofshift bars coupled together for movement relative to each other into oneor the other of two positions, said shift bars being caused to assumesaid one or the other positions by the direct actuation of a keybelonging respectively to the one or the other type group; and

d. first means responsive to the relative shift of said shift bars fromone position to the other for effecting a disconnection of said actualtransmitter and actuation of said auxiliary transmitter for a timerequired for transmission of a type group shift signal combination, theposition of said shift bars operating on said auxiliary transmitter tocontrol the transmission of the corresponding one or the other of saidtype group shift signal combinations. said auxiliary transmitter itselfeffecting a return to the actual transmitter during the transmitted stopelement immediately following the type group shift signal combination,with the presetting of the transmitter clutch being suppressed prior tosaid stop element to permit a following transmission of the charactercode signal combination corresponding to the depressed key.

2. The arrangement according to claim 1 wherein the individual shiftbars of the shaft bar assembly, with the aid of correspondingly designedcursors associated with the key levers, are capable of being adjustedvertically in relation to one another, and wherein said bars are coupledto one another via cross levers which in turn are coupled to each othervia a coupling rod operating on said auxiliary transmitter, and whereinsaid first means include a connecting lever operatively coupled to saidshaft bar assembly which, upon each relative vertical movement of saidshift bars initiates the disconnection of said actuate transmitter andthe actuation of said auxiliary transmitter.

3. The arrangement according to claim 1 wherein said shift bar assemblyis provided with teeth and is capable of being horizontally displaced,said teeth, in their assignment to the key as positioned thereabove, andeither to the one or the other type group being provided with oppositelydirected inclined portions, and wherein said shifi bar, at its one end,is provided with an oblong hole which is arranged in an inclined fashionso as to provide operative engagement of said shift bar with aconnecting lever via a pin.

4. The arrangement according to claim 2 further including a shift leverand a locking pawl having one end designed as a leveling cam portion,wherein said connecting lever, via its free end, acts upon said lockingpawl at the cam portion thereof and wherein said locking pawl, via itsother end 1 designed as a bolt snug, serves to support said shift leverin its normal position, said lifting cam portion being so designed as topermit the pawl, upon completion of the swivel movement imparted theretoby said converting lever, to resume its normal position.

5. The arrangement according to claim 4 further including a switchovercontact, a supporting pawl,'a transmitter shaft, a

first cam plate, on said shaft, and an uncoupling lever operativelyconnected to said supporting pawl and to said first cam plate, on saidshaft, and an uncoupling lever operatively connected to said supportingpawl and to said first cam plate wherein said shift lever in a releasedcondition as provided by the swivel movement of said locking pawl,serves to actuate said switchover contact, and wherein the supportingpawl, for latching the uncoupling lever in relation to the clutch, isretained in a disengaging position, and wherein resetting of said shiftlever is effected by the first cam plate as seated on said transmittershaft.

6. The arrangement according to claim 5, wherein by said switchovercontact the transmitting contacts of the actual transmitter aredisconnected in favor of the auxiliary transmitter.

7. The arrangement according to claim 6 wherein said auxiliarytransmitter includes second and third cam plates and associated firstand second auxiliary transmitting contacts, and wherein said second andthird cam plates are affixed to the transmitter shaft which is common tosaid actual transmitter, and wherein the second cam plate is designed tohave a shape by which the first auxiliary transmitting contact, in thecourse of one rotation of the transmitter shaft according to the onetype group shift signal combination e.g. Figures"), is opened andclosed, and wherein the third cam plate is so designed that theassociated second auxiliary transmitting contact is only released toperform a closure with respect to the third signal combination element,and wherein the two auxiliary transmitting contacts are connected inparallel.

8. The arrangement according to claim 7 further including a lockinglever and means for coupling said locking lever to said shift barassembly wherein the second auxiliary transmitting contact is preventedfrom being closed when said shift bar assembly is in the first position.

9. The arrangement according to claim 4 further including a firstmicroswitch arranged in series with said second auxiliary transmittingcontact, and wherein said coupling means is provided with a first camvia which the first microswitch is actuated when the shift bar assemblyis in the first position.

10. The arrangement according to claim 9 wherein the lower end of saidlocking pawl includes an armature plate to which there is associated apull magnet, and that in the circuit of this magnet is arranged a secondmicroswitch which during displacement of said bar assembly istemporarily actuated.

ll. The arrangement according to claim 10 wherein the means for couplingsaid locking lever to said shift bar assembly includes a second camwhich, upon displacement of said shift bar assembly, causes said secondmicroswitch to temporarily close during said displacement.

12. A teleprinter keyboard transmitter arrangement for automaticallyinserting type group shift signals, in which the individual key leversof the keyboard unit thereof are assigned a single character and inwhich disengagement of a oncereleased transmitter clutch is dependentupon a presetting which is effected in the course of the transmittershaft rotation, comprising a shift bar assembly which is common to allkey levers and which, in shifting between type groups, is caused to moveby the respective key from a first switching position into a secondswitching position, the movement of the shift bar assembly effecting adisconnection of the actual transmitter and actuation of an auxiliarytransmitter for a time required for transmission of a type group shiftsignal combination, said auxiliary transmitter, in dependence upon theposition of the shift bar assembly transmits the one or the other typegroup shift signal combination, wherein a return to the actualtransmitter is effected during the stop element immediately followingsaid type group shift signal combination, and that prior to said stopelement the presetting of the transmitter clutch is suppressed, saidshift assembly including a pair of shift bars, which, with the aid ofcorrespondingly designed cursors associated with the key levers, arecapable of being adjusted vertically relative to one another, said shiftbars being cou led to one another via cross levers which in turn arecouple to one another vta a coupling rod, and wherein a connecting leveroperatively coupled to said shift bar assembly performs a swivelmovement upon each vertical movement of said shift bars.

13. A teleprinter keyboard transmitter arrangement for automaticallyinserting type group shift signals, in which the individual key leversof the keyboard unit thereof are assigned a single character and inwhich disengagement of a oncereleased transmitter clutch is dependentupon a presetting which is effected in the course of the transmittershaft rotation, comprising a shift bar assembly which is common to allkey levers and which, in shifting between type groups, is caused to moveby the respective key from a first switching position into a secondswitching position, the movement of the shift bar assembly effecting adisconnection of the actual transmitter and actuation of an auxiliarytransmitter for a time required for transmission of a type group shiftsignal combination, said auxiliary transmitter, in dependence upon theposi tion of the shift bar assembly transmits the one or the other typegroup shift signal combination, wherein a return to the actualtransmitter is effected during the stop element immediately followingsaid type group shift signal combination, and that prior to said stopelement the presetting of the transmitter clutch is suppressed, saidshift bar assembly being capable of horizontal displacement and providedwith teeth which, in their assignment to the keys as positionedthereabove belonging to either the one or the other type group, areprovided with oppositely directed inclined portions, wherein said shiftbar assembly is provided at one end thereof with an oblong aperturearranged in an inclined manner to provide operative engagement of saidshift bar assembly with a connecting lever via a pin belonging thereto.

1. A teleprinter keyboard transmitter arrangement for automaticallyinserting character (type) group shift signals, in which the individualkey levers of the keyboard unit are assigned a single character and inwhich disengagement of the transmitter clutch, following the actuationof a key lever requiring a type group shift, is dependent upon apresetting which is effected in the course of the transmitter shaftrotation, comprising: a. an actual transmitter for transmittingcharacter code signal combinations; b. an auxiliary transmitter, havinga common transmitter shaft with said actual transmitter, fortransmitting type group shift signal combinations; c. a shift barassembly common to all key levers, including a pair of shift barscoupled together for movement relative to each other into one or theother of two positions, said shift bars being caused to assume said oneor the other positions by the direct actuation of a key belongingrespectively to the one or the other type group; and d. first meansresponsive to the relative shift of said shift bars from one position tothe other for effecting a disconnection of said actual transmitter andactuation of said auxiliary transmitter for a time required fortransmission of a type group shift signal combination, the position ofsaid shift bars operating on said auxiliary transmitter to control thetransmission of the corresponding one or the other of said type groupshift signal combinations, said auxiliary transmitter itself effecting areturn to the actual transmitter during the transmitted stop elementimmediately following the type group shift signal combination, with thepresetting of the transmitter clutch being suppressed prior to said stopelement to permit a following transmission of the character code signalcombination corresponding to the depressed key.
 2. The arrangementaccording to claim 1 wherein the individual shift bars of the shaft barassembly, with the aid of correspondingly designed cursors associatedwith the key levers, are capable of being adjusted vertically inrelation to one another, and wherein said bars are coupled to oneanother via cross levers which in turn are coupled to each other via acoupling rod operating on said auxiliary transmitter, and wherein saidfirst means include a connecting lever operatively coupled to said shaftbar assembly which, upon each relative vertical movement of said shiftbars initiates the disconnection of said actuate transmitter and theactuation of said auxiliary transmitter.
 3. The arrangement according toclaim 1 wherein said shift bar assembly is provided with teeth and iscapable of being horizontally displaced, said teeth, in their assignmentto the key as positioned thereabove, and either to the one or the othertype group being provided with oppositely directed inclined portions,and wherein said shift bar, at its one end, is provided with an oblonghole which is arranged in an inclined fashion so as to provide operativeengagement of said shift bar with a connecting lever via a pin.
 4. Thearrangement according to claim 2 further including a shift lever and alocking pawl having one end designed as a leveling cam portion, whereinsaid connecting lever, via its free end, acts upon said locking pawl atthe cam portion thereof and wherein said locking pawl, via its other enddesigned as a bolt snug, serves to support said shift lever in itsnormal position, said lifting cam portion being so designed as to permitthe pawl, upon completion of the swivel movement imparted thereto bysaid converting lever, to resume its normal position.
 5. The arrangementaccording to claim 4 further including a switchover contact, asupporting pawl, a transmitter shaft, a first cam plate, on said shaft,and an uncoupling lever operatively connected to said supporting pawland to said first cam plate, on said shaft, and an uncoupling leveroperatively connected to said supporting pawl and to said first camplate wherein said shift lever in a released condition as provided bythe swivel movement of said locking pawl, serves to actuate saidswitchover contact, and wherein the supporting pawl, for latching theuncoupling lever in relation to the clutch, is retained in a disengagingposition, and wherEin resetting of said shift lever is effected by thefirst cam plate as seated on said transmitter shaft.
 6. The arrangementaccording to claim 5, wherein by said switchover contact thetransmitting contacts of the actual transmitter are disconnected infavor of the auxiliary transmitter.
 7. The arrangement according toclaim 6 wherein said auxiliary transmitter includes second and third camplates and associated first and second auxiliary transmitting contacts,and wherein said second and third cam plates are affixed to thetransmitter shaft which is common to said actual transmitter, andwherein the second cam plate is designed to have a shape by which thefirst auxiliary transmitting contact, in the course of one rotation ofthe transmitter shaft according to the one type group shift signalcombination e.g. ''''Figures''''), is opened and closed, and wherein thethird cam plate is so designed that the associated second auxiliarytransmitting contact is only released to perform a closure with respectto the third signal combination element, and wherein the two auxiliarytransmitting contacts are connected in parallel.
 8. The arrangementaccording to claim 7 further including a locking lever and means forcoupling said locking lever to said shift bar assembly wherein thesecond auxiliary transmitting contact is prevented from being closedwhen said shift bar assembly is in the first position.
 9. Thearrangement according to claim 4 further including a first microswitcharranged in series with said second auxiliary transmitting contact, andwherein said coupling means is provided with a first cam via which thefirst microswitch is actuated when the shift bar assembly is in thefirst position.
 10. The arrangement according to claim 9 wherein thelower end of said locking pawl includes an armature plate to which thereis associated a pull magnet, and that in the circuit of this magnet isarranged a second microswitch which during displacement of said shiftbar assembly is temporarily actuated.
 11. The arrangement according toclaim 10 wherein the means for coupling said locking lever to said shiftbar assembly includes a second cam which, upon displacement of saidshift bar assembly, causes said second microswitch to temporarily closeduring said displacement.
 12. A teleprinter keyboard transmitterarrangement for automatically inserting type group shift signals, inwhich the individual key levers of the keyboard unit thereof areassigned a single character and in which disengagement of aonce-released transmitter clutch is dependent upon a presetting which iseffected in the course of the transmitter shaft rotation, comprising ashift bar assembly which is common to all key levers and which, inshifting between type groups, is caused to move by the respective keyfrom a first switching position into a second switching position, themovement of the shift bar assembly effecting a disconnection of theactual transmitter and actuation of an auxiliary transmitter for a timerequired for transmission of a type group shift signal combination, saidauxiliary transmitter, in dependence upon the position of the shift barassembly transmits the one or the other type group shift signalcombination, wherein a return to the actual transmitter is effectedduring the stop element immediately following said type group shiftsignal combination, and that prior to said stop element the presettingof the transmitter clutch is suppressed, said shift assembly including apair of shift bars, which, with the aid of correspondingly designedcursors associated with the key levers, are capable of being adjustedvertically relative to one another, said shift bars being coupled to oneanother via cross levers which in turn are coupled to one another via acoupling rod, and wherein a connecting lever operatively coupled to saidshift bar assembly performs a swivel movement upon each verticalmovement of said shift bars.
 13. A teleprinter keyboard transmitterarrangement for automatically inserting type group shift signals, inwhich the individual key levers of the keyboard unit thereof areassigned a single character and in which disengagement of aonce-released transmitter clutch is dependent upon a presetting which iseffected in the course of the transmitter shaft rotation, comprising ashift bar assembly which is common to all key levers and which, inshifting between type groups, is caused to move by the respective keyfrom a first switching position into a second switching position, themovement of the shift bar assembly effecting a disconnection of theactual transmitter and actuation of an auxiliary transmitter for a timerequired for transmission of a type group shift signal combination, saidauxiliary transmitter, in dependence upon the position of the shift barassembly transmits the one or the other type group shift signalcombination, wherein a return to the actual transmitter is effectedduring the stop element immediately following said type group shiftsignal combination, and that prior to said stop element the presettingof the transmitter clutch is suppressed, said shift bar assembly beingcapable of horizontal displacement and provided with teeth which, intheir assignment to the keys as positioned thereabove belonging toeither the one or the other type group, are provided with oppositelydirected inclined portions, wherein said shift bar assembly is providedat one end thereof with an oblong aperture arranged in an inclinedmanner to provide operative engagement of said shift bar assembly with aconnecting lever via a pin belonging thereto.